During the shoot, Patrick Tse even jokes around in Kenneth Tsang's wheel chair and has him push him around

Wu Fung re-enacts how his glasses flew off during the fight
courtesy of on.cc

While promoting their upcoming TVB program FOUR AMIGOS BON VOYAGE, Patrick Tse Yin declined to talk about the trip. "Don't let me talk, I would talk about the bad stuff. I was a little upset but I toughed it out." The event got awkward until Wu Fung and the others talked over each other about the trip. Tse Yin later waited until TVB and the sponsors left before officially putting Kenneth Tsang Kong on full blast.
Wu Fung tried to intervene, while Joe Junior looked on helplessly. Then Tse Yin slapped Kenneth Tsang.